Research Papers: Sensing

In-vitro detection of artificial caries on vertical dental cavity walls using infrared photothermal radiometry and modulated luminescence

[+] Author Affiliations
Jungho Kim

University of Toronto, Center for Advanced Diffusion-Wave Technologies, Department of Mechanical and Industrial Engineering, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada

Andreas Mandelis

University of Toronto, Center for Advanced Diffusion-Wave Technologies, Department of Mechanical and Industrial Engineering, 5 King’s College Road, Toronto, Ontario M5S 3G8, Canada

Quantum Dental Technologies Inc., 748 Briar Hill Avenue, Toronto, Ontario M6B 1L3, Canada

Stephen H. Abrams

Quantum Dental Technologies Inc., 748 Briar Hill Avenue, Toronto, Ontario M6B 1L3, Canada

Jaclyn T. Vu, Bennett T. Amaechi

University of Texas Health Science Center at San Antonio, Department of Comprehensive Dentistry, 7703 Floyd Curl Drive, San Antonio, Texas 78229-3900

J. Biomed. Opt. 17(12), 127001 (Dec 03, 2012). doi:10.1117/1.JBO.17.12.127001
History: Received July 27, 2012; Revised October 20, 2012; Accepted October 30, 2012
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Abstract.  The main objective of the study was to investigate the ability of frequency-domain photothermal radiometry (PTR) and modulated luminescence (LUM) to detect secondary caries lesions on the walls of restorations (wall lesions). Changes in experimental PTR-LUM signals due to sequential demineralization on entire vertical walls of sectioned tooth samples were investigated. In addition, transverse micro-radiography (TMR) analysis (used as a gold standard) was conducted to measure the degree of demineralization that occurred in each sample. Statistical correlation between TMR results and PTR-LUM signals was determined using Pearson’s correlation coefficient. LUM signals were found to be dominated by the scattered component of the incident laser beam. The more clinically relevant cases of localized demineralization and remineralization on vertical walls were also investigated to examine whether PTR-LUM signals are sensitive to demineralization and remineralization of much smaller areas. The overall results demonstrated that PTR-LUM is sensitive to progressive demineralization and remineralization on vertical walls of sectioned tooth samples.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Jungho Kim ; Andreas Mandelis ; Stephen H. Abrams ; Jaclyn T. Vu and Bennett T. Amaechi
"In-vitro detection of artificial caries on vertical dental cavity walls using infrared photothermal radiometry and modulated luminescence", J. Biomed. Opt. 17(12), 127001 (Dec 03, 2012). ; http://dx.doi.org/10.1117/1.JBO.17.12.127001


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